Determination of Pollen Viability in Different Clones of Larix Gmelinii Seed Orchard in Wuliji Han
Larix gmelinii is a major afforestation species in the northeastern forest regions of China,characterized by strong resistance and excellent wood quality.However,when trees of this species reach over 30 years old,difficulties in fruiting or a high incidence of empty seeds can significantly affect the production of seeds in seed orchards and mother forests.This study used 12 clones from three provenances in the National Tree Seed Base of Larix gmelinii(primary seed orchard)in Wuliji Han as materials to determine the pollen viability of selected clones in the seed orchard.The results indicated that there were significant differences in pollen inactivation rates among different provenances and clones of Larix gmelinii.The origin of superior trees,stand age,forest site type,and management techniques all affect pollen viability.This study preliminarily explored the reasons for the lack of fruiting in mother trees of the seed orchard,aiming to provide technical support for improving the management level of Larix gmelinii seed orchards.
万方数据
维普
